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    <title>Document</title>
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<script>
    function func(number){
        let arr = number.toString().split("")
        for(let i = 0;i<arr.length;i++){
            arr[i] = (Number(arr[i]) + 3) % 10
        }
        arr.reverse()
        return arr.join('')
    }
    let data =  prompt('输入要加密的数字')
    console.log(func(data));
</script>
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